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Class Information
Number: 4/DIG.19
Name: Baths, closets, sinks, and spittoons > Liquid-solid separators

Patents under this class:

Patent Number Title Of Patent Date Issued
8631947 Cyclone separator Jan. 21, 2014
8596469 Cyclone separator Dec. 3, 2013
8561220 Keeping sewer drainlines clear with low flush toilets or cisterns Oct. 22, 2013
8382993 Drain filter apparatus and method Feb. 26, 2013
7998250 Multiple vortex waste separator apparatus Aug. 16, 2011
7998251 Vortex waste separator apparatus Aug. 16, 2011
6838000 Method and device for sewage treatment Jan. 4, 2005
6547080 Collapsible colander for straining and rinsing Apr. 15, 2003
6412121 Thermo-evaporation type toilet system Jul. 2, 2002
6101641 Waste removal method for dry toilets Aug. 15, 2000
5901385 Dry type toilet system May. 11, 1999
5830358 Method and apparatus for decomposition of organic waste Nov. 3, 1998
5378375 Apparatus and method of washing screenings Jan. 3, 1995
5372718 Filtering device Dec. 13, 1994
5354465 Large capacity filter system Oct. 11, 1994
5303431 Composting toilet Apr. 19, 1994
5289595 Dry-operated rotary composting toilet Mar. 1, 1994
5068926 Flush toilet Dec. 3, 1991
4973402 Flow restrictor and strainer assembly for a toilet tank fill valve and the like Nov. 27, 1990
4894872 Waterless sanitation system with ventilation Jan. 23, 1990
4561132 Air-vac toilet Dec. 31, 1985
4313233 Waterless flush toilet system Feb. 2, 1982
4254515 Compost-type toilet equipment Mar. 10, 1981
4222130 Waterless flush toilet system Sep. 16, 1980
4197597 Water recycling with solids and foam removal Apr. 15, 1980
4142261 Arrangement in sanitary closet systems Mar. 6, 1979
4087869 Toilet in which solid wastes are collected and decomposed May. 9, 1978
4063315 Vacuum toilet system Dec. 20, 1977
4052758 Human waste disposal system Oct. 11, 1977
4014767 Self-contained waste disposal system including self-cleaning filter Mar. 29, 1977
4011606 Bedpan liner, kit and method Mar. 15, 1977
3974528 Sewage system with reusable flush medium Aug. 17, 1976

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